The Advocate-Messenger reports Rebecca S. Markert, an attorney for the Freedom From Religion Foundation, said in the letter to Danville Mayor Bernie Hunstad that the prayers were "unnecessary, inappropriate and divisive."

Hunstad confirmed receiving the letter, but said it didn't change his viewpoint that the commission's prayer to open each meeting is legal.

City attorney Stephen Dexter said he had not reviewed the letter, but had thoroughly researched the issue and is "confident that we're abiding by the law."

The Obama administration will unveil a major climate change plan Monday aimed at a large reduction in greenhouse gas emissions from the nation's coal-burning power plants, a senior administration official told CNN.